"Needs to be done" - none.
But I think there will be another attacking player available by the end of the month if the club manages to get rid of Locadia and send Richards & Roberts out on loan. If it is a new signing or someone returning from loan is difficult to tell.
Either that or GP tried...
And that guess from The Argus is probably correct. I think any player incoming is more likely to be someone like Trossard who can play in any attacking role. Like Mitoma or Khadra.
If Connolly goes I'm pretty sure someone will arrive. If that is Khadra/Zeqiri/Mitoma or someone else is a different question. It could even be something as unusual as a loan player (since it might be problematic to sign someone when a bunch of attacking players are coming back in the summer).
Goalkeepers
No need to do anything here which is also most likely what will happen.
Defenders
Could see Haydon Roberts going to loan in the Championship. After his not so successful spell in Rochdale I dont think there was much interest from clubs above League Two, which was probably below...